Windshield wiper



Patented Sept. 27, 1938 PATENT OFFICE WINDSHIELD WIPER Lawrence W.Waters, Los Angeles, Calif. Application January 2, 1937, Serial No.118,869

" 2 Claims.

vehicle, but with fluid other than the oil of the forced lubricatingsystem of the vehicle.

Another object is to provide a windshield wiper which wipes thewindshield only in one direction of its movement, and is held out ofcontact with the windshield in the other direction of its movement, sothatit will not smear the windshield during its movement in said otherdirection, with water remaining on it at the end of its movement in saidfirst direction.

A further object is to provide a windshield wiper which reciprocatesvertically over the windshield and wipes the windshield only on itsdown-stroke, being held out of contact with the windshield on itsup-stroke, so as not to smearthe windshield with water left on it at theend of its down-stroke, and so that water will not run over it from thewindshield and back onto the windshield on its up-stroke. 1

Other objects and advantages will appear hereinafter.

The invention is illustrated in the annexed drawing which forms a partof this specification and in which:

Fig. 1 is a view, partly in front elevation and partly schematic, of myinvention, shown applied to the windshield and lubrication pump of amotor vehicle.

f Fig. 2 is a perspective of one of the. wipermembers of my invention.

Fig. 3 is an end view of one of the wiper members and cross section of awindshield, with the wiper member shown held out of contact with thewindshield in the position it assumes on its up-stroke.

Fig. 4 is a cross section of the wiper member Fig. 7 is a verticallongitudinal section oi said wiper motor taken on line 1-4 of Fig. 6.

Fig. 8 is a front elevation of the hydraulic pump of my invention.

Referring to the annexed drawing, in which corresponding parts aredesignated by the same reference characters in 'all of the figures, myinvention includes generally a pair of wiper members I, a wiper motor 2,wiper atcuating means 3 for each wiper member I, operated by said motor,a wiper fluid pump 4 for operating said motor, and a fluid tank 5 forcontaining the fluid pumped by said pump through said motor foroperating the same. I

As illustrated in Fig. 1 of the drawing, my wiper may be applied to amotor vehicle windshield 5 formed with a pair of glass panels I,separated by a vertical frame member 8 centrally of the vehicle with thewiper members I positioned respectively in front of said panels, to wipethe same respectively.

Each of the wiper members I comprises a wiper bar 9, a wiper arm Ill, onwhich said bar is mounted, and a sleeve II, on which said arm ismounted, which sleeve is slidably fitted on a vertical square rod 12secured at its upper end at l2 to a side frame member l3 of thewindshield 6, and at its lower endat l3 to a suitable part of the motorvehicle. Each wiper bar 9 comprises a channel bar l4 anda flexible stripI5 of rubber or other suitable material, the outer edge of which stripis clamped in said channel bar, and said channel bar is formed with aflange l6 outstanding from its outer edge, and a pair of lugs l'lupstanding from the upper side of said channel bar at the ends thereofrespectively; on the ends of lugs are secured rubber .caps l8. Eachwiper arm l0 may be formed of aisingie piece of wire I9, bent uponitselfat 20. twisted near its bend 20 at 2| and its ends 22 and 23 benddownwardly and upwardly respectively at right angles to said wire, whichbent ends are turnably fitted in a pair of lugs 24 and 25 respectivelyformed on a sleeve H. The twist 2| in the wire Iii forms a longitudinalslot 26 between the bent members 21 and 28 of the wire, between saidtwist and the outer end, at 20, of the wiper am Hi, through which slotthe flange IS, on the channel bar I4, is inserted, whereby thewiper bar9 is mounted on the outer end of the arm III. A cross member 29 extendsbetween and is secured to the arm members 21 and 28 near their pivotedends 22 and 28, and-said cross member is formed with a stud 3 whichfltsloosely in an opening 30' in the wiper channel bar I4 and holdstheadjacent end of the wiper bar steady, but allows said bar to swing upor down from the arm ill at the connection of the bar and arm by the barflange l6 and arms slot 26. A cross wire 3| extends between and issecured to the arm members 21 and 28-close to the pivoted ends 22 and 23of the arm I, and a spring 32 is coiled around the sleeve H, with oneend 33 secured to said sleeve and its other end 34 secured to said crosswire 3|, whereby the arm l0 and wiper bar 9 are swung inwardly to holdthe rear edge of the wiper strip |5 against .a glass panel 1 of thewindshield 6.

The wiper motor2 comprisesa stator 35 and a rotor 36 ,journaled withinsaid stator. The stator 35 is in the form of a casing 31 with one endwall 38 detachably secured to one end of said casing by screws 39.Bearings 4|) and 4| are formed respectively in the fixed end wall 42 andthe detachable end wall 38 of the stator 35. The stator casing is formedwith an internal spiral wall 31 about the axis of the bearings and 4|.The rotor 36 comprises a hub 43, formed with trunnions 44 and 45journaled in bearings 40 and 4| respectively, and a plurality of radialblades 46 slidably mounted in radial slots 41 in said hub, the outerends of which blades wipe the spiral internal wall 39 of the stator 35.The stator 35 is provided with an inlet 48 and an outlet 49, said inletleading into the stator between the low point and the high point of thespiral wall 31, and said outlet leading from the stator at a pointslightly greater than 90 from said inlet.

The wiper actuating means 3 comprises a crank 50 secured on the outerend of the rotor trunnion 45, a pair of levers 5| pivoted at 52 atsuitable points on the motor vehicle, a pair of links 53 pivoted at oneend to said crank 50 and at their other ends to one end of said levers5| respectively, and a pair of links 54 pivoted at one end to the otherends of said levers 5|, respectively, and at their other ends to thelower ends of the wiper sleeves II respectively.

The wiper fluid pump 4 comprises a casing 55, provided with an inlet 56and an outlet 51, and a pair of intermeshing gears 58 and 59, journ'aledin said casing, said inlet and said outlet being located in the upperandlower walls respectively of said casing opposite the intermeshing teethof said gears. The casing 55 is formed at its inner edge with anexternal flange 60 which is bolted to the outer side of the casing ofthe lubrication pump 6| of the motor vehicle. The drive shaft 62 of saidlubrication pump is extended'through the casing of said pump and throughthe casing 55 of the fluid pump 4 and into said fluid pump,

, and .the gear 56 of said fluid pump is secured on The wiper fluid pump4 being driven by the drive shaft 62 of the lubrication pump 6| of themotor vehicle, fluid is pumped by the wiper fluid pump 4, from the tank5, into said fluid pump and from said pump fluid is pumped through pipeand motor inlet 46 into the wiper fluid motor 2, and acting upon therotorblades 46 rotates the rotor 36 and is forced by the rotor bladesout of the motor through its outlet 49 and through pipe 63 back into thetank 5, completing the pumping cycle which is repeated. Rotation of therotor 36 rotates its trunnion 45 and the crank 38, whereupon the levers5| through links 53, are oscillated, and the wiper members I, throughlinks 54 connected to the wiper sleeves H, are reciprocated up and downover the windshield 6. On the down stroke of the wiper members the wiperstrips l5 contact with the windshield panels 1, which causes the wiperbars 9 to swing up at an angle from the wiper arms I, as shown in Figs.4 and 5 of the drawing, and in said angular position of the wiper barsthe wiper strips l5 wipe said panels (see Figs. 4 and 5). On theup-stroke of the wiper members the wiper strips l5 at the beginning ofsaid stroke, being in contact with the windshield panels 1, cause thewiper bars 9 to swing down at an angle from the wiper arms In, until therubber caps I8, of the lugs l1 on said wiper bars, engage the surface ofthe windshield panels 1 and hold the wiper strips |5 out of contact withthe surface of said panels, and in this position the wiper bars moveupwardly to the end of their up-strokes so that no water will flow fromthe windshield over said wiper bars, or. be smeared by said bars on thewindshield on said up-stroke of said wiper members. (See Fig. 3.)

Normally the springs 32 swing the wiper arms l0 and bars 9 rearwardlyuntil the rear edges of the wiper strips l5 or the lug caps l8 engagethe surfaces of the windshield panels 1, but the wiper bars and arms maybe grasped and swung forwardly away from said panels against the tensionof said springs when desirable.

The wiper bars 9 may be readily removed from the arms III by withdrawingthe flanges |6 fromthe glass panels 1 of the windshield 6 and the'rubber wiper strips l5 out of contact with said glass panels as shown inFig. 3 of the drawing, thus preventing said rubber wiper strips frombreaking down under continued contact-under tension with thewindshieldpanels.

An important advantage of my invention is that my hydraulic motorisoperated by clean -fluid and not by the lubricating oil of theforcedfeed lubricating system of the motor vehicle,-so

that no carbon from the engine can get into,

the fluid utilized .in my pump to operate my motor. a

I claim:

1. In a windshield wiper, a wiper member including a wiper bar, a wiperarm, means whereby said wiper arm is slidably and operatively mounted, aflange onsaid wiper bar, said wiper arm being provided with a slot toreceive said flange for mounting said bar on said arm to swing up ordown laterally from said arm, means on said arm for engaging one end ofsaid bar to hold saidbar steady while permitting said bar to swinglaterally on said arm, studs on said bar forengaging a windshield andholding said bar out of contact with said windshield when said bar isswung down from saidam on the upstroke of said wiper member, and meansfor urgmg said wiper bar toward said windshield.

2. In combinatioi. with a motor vehicle, a pair of wiper members forwiping the windshield of the motor vehicle at opposite sidesrespectively of the center of said windshield. vertical rods mounted atopposite sides respectively of said II -windshield, said wiper Inemhersrespectively in-' pair of leversmountedon the motor vehicle,

eluding sleeves slidably mounted on said rods links connecting one endof said levers respecrespectively for vertical reciprocation of said'tiveiy and said crank, and'links connecting the wiper members, a rotarymotor mounted on said other ends respectively 01 said levers and said -5motor vehicle; means whereby said motor is wiper sleeves respectively.driven, a crank .01: the shaft 01 said motor, a V p LAWRENCE W. WATERS.

